<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<meta name="viewport" content="width=device-width, initial-scale=1.0">
		<title></title>
		<link rel="stylesheet" href="./Bootstrap4.6.1/css/bootstrap.css">
		<script src="./Bootstrap4.6.1/js/jquery.js"></script>
		<script src="./Bootstrap4.6.1/js/bootstrap.bundle.js"></script>
		<style>
			span{
				/* margin-top: 3rem;
				margin-left: 1rem; */
				display: inline-block;
				width: 100px;
				height: 100px;
				
			}
			.bg1{
				background-color: rgba(255, 255, 255, 0.5);
			}
			.bg2{
				background-color: rgba(0, 0, 0, 1);
			}
		</style>
	</head>
	<body>
		<div class="container">
			<span class="text-primary m-4">0001</span>
			<span class="text-success bg-primary p-5 p-0">0002</span>
			<span class="text-secondary">0003</span>
			<span class="text-muted">0004</span>
			<span class="text-white-50 bg-dark">0005</span>
			<span class="bg-dark text-white">0006</span>
			
		</div>
		<div class="container p-lg-0 p-3 m-0 mx-auto">
			<span class="bg1"></span>
			<span class="bg2 "></span>
		</div>
		<div class="container">
			<div class="bg-danger p-5">
				<span class="bg-white ml-n5">span</span>
			</div>
		</div>
	</body>
</html>